The new modular configuration system requires one global
header per module, that is included by all other files in
this module.
QtDBus already had such a header, but its name (qdbusmacros.h) was
not in line with what's being used in all other modules. So
add a qtdbusglobal.h header, and turn qdbusmacros.h into a a forwarding
header to that new global header file.
Change-Id: Ib7eb2484c7b8b588eb89bf3290cb6c1c7c391fe2
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>